warning window

[Rifeline]

I get a window saying "You have opened a file of type 'DXF files' with the gcode input filter. Are you sure you meant to do this? Select NO to open the file with the DXF filter.... Is this just a type of DXF that sheetcam doesn't like or something else ? It's never happened before but I am not well versed in the use of sheetcam...yet....